JP2001108374A - Device for aligning kiln shells - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for aligning kiln shells which enables reduction of a burden of work and shortening of a term of work. SOLUTION: A device for aligning kiln shells aligns the positions of a kiln shell 1a on one side and a kiln shell 1b on the other to be concentric on the occasion of connecting the kiln shells 1a and 1b face to face with each other. This device is equipped with a main-body frame 11 disposed over the insides of the two kiln shells 1a and 1b and extending in the direction of the axes thereof, a plurality of extensible-contractible hydraulic jacks 12 (jack means) extending radially in the direction of the radiuses of the two kiln shells 1a and 1b from the portions in the main-body frame 11 positioned on one kiln shell 1a side and the other kiln shell 1b side respectively and a hydraulic unit 13 (interlocking operation means) controlling the hydraulic jacks 12 so that they can extend and contract respectively, in interlocking, by the same amount at the individual positions of disposition thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a kiln shell aligning device for correcting a relative misalignment of a rotary kiln when connecting the kiln shells.

[0002]

2. Description of the Related Art FIG. 4 shows a part of a rotary kiln for firing cement or the like. This type of rotary kiln 1 is composed of a plurality of tires 2 which are fitted at required intervals in the longitudinal direction. The bed 3 is supported by a pair of rotatable support rollers 4 and 4 disposed on both sides in the width direction of the bed 3 provided corresponding to the position of the tire 2. The reduction gear 6, the main pinion 7 and the girth gear 8 are driven by the electric motor 5. And the like, and is rotatably driven through the like, and the whole thereof is installed in a state of being inclined toward the longitudinal direction.

[0003] While rotating the rotary kiln 1, the powdery material such as cement raw material is gradually moved from one end located at a relatively high position to the other end located at a low position. The inside of the rotary kiln 1 is heated by burning by a burner (not shown) inserted and disposed at the other end of the rotary kiln to bake the powder.

[0004] In the rotary kiln 1 as described above, since the entire structure is large and long,
As shown in FIG. 5, a plurality of kiln shells 1a, 1b are welded to each other in the longitudinal direction and connected to each other. When the kiln shells 1a, 1b are to be installed, the kiln shells 1a, 1b to be connected are connected to each other. Axis A, B of
It is necessary to match the skin of the welded joint part.

Conventionally, when the axes A and B of the kiln shells 1a and 1b are aligned with each other, the other kiln shell 1a already mounted on the bed 3 is supported by a temporary support (not shown). The position of the kiln shell 1b is adjusted, and more specifically, an L-shape in which the tip faces the end of the other kiln shell 1b at about 30 to 40 places on the inner peripheral surface of the end of one kiln shell 1a. The base end of the strong back 9 of the mold is welded, and the wedge member 10 is driven into a gap between the distal end of the strong back 9 and the inner peripheral surface of the end of the other kiln shell 1b, so that the other kiln shell 1b with respect to the one kiln shell 1a. Relative misalignment is corrected.

[0006]

However, in such conventional means, after the work of connecting the kiln shells 1a and 1b to each other is completed, all the strong backs 9 welded to the inner peripheral surface at the end of one of the kiln shells 1a are removed. Must be removed, and the kiln shell 1
Since a large number of welding traces remaining on the inner peripheral surface at the end of the one kiln shell 1a had to be finished with a grinder or the like so that the inner peripheral surfaces of the a and 1b could be covered with the refractory bricks satisfactorily. There is a problem in that a large amount of labor and time are required, which leads to an increase in a work load and a prolonged construction period.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a kiln shell aligning apparatus capable of reducing a work load and shortening a construction period.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a kiln shell aligning apparatus for aligning one kiln shell with another kiln shell so as to be concentric with each other when the kiln shells are connected to each other. A main body frame that is disposed astride the inside of the kiln shell and extends in the axial direction of the two kiln shells; and a radial direction of the two kiln shells from respective portions of the main body frame located on one kiln shell side and the other kiln shell side. A plurality of expandable and contractible jack means extending radially toward the apparatus, and an interlocking operation means for controlling the respective jack means to be able to expand and contract in an interlocking manner by the same amount for each arrangement position. It is.

Therefore, in the present invention, the main body frame is disposed so as to straddle the insides of the two kiln shells butted with each other, and the jack means disposed on one of the kiln shells is interlocked by the same amount by the interlocking operation means. When the jacks extend radially, each jack means extends equally and abuts the entire inner peripheral surface of one of the kiln shells, so that the main body frame is positioned at the axial center position of the one kiln shell.

After that, when the respective jack means arranged on the other kiln shell are radiated and extended by the same amount by the interlocking operation means, the main body frame fixed to the one kiln shell is moved. As a reference, the position of the other kiln shell is adjusted by the respective jack means, and when the respective jack means extend uniformly and abut against the inner peripheral surface of the other kiln shell, the other kiln shell takes the main body frame as the axial center position. As a result, the other kiln shell is concentrically positioned with respect to the one kiln shell.

After the two kiln shells aligned concentrically with each other are connected by means of welding or the like, all jack means at the respective positions are contracted to release the fixed state of the main body frame in the two kiln shells. Then, the kiln shell centering device may be removed from the end of the other side of the kiln shell on the non-connection side.

This eliminates the need for a strong back as in the prior art, so that after the connection between the kiln shells is completed, all of the strong back welded to the inner peripheral surface at the end of one of the kiln shells is removed. In addition, there is no need to use a grinder to finish a large number of welding marks remaining after the removal.

Further, in the present invention, it is preferable that the respective jack means are arranged so as to form a pair in the diameter direction of the kiln shell. In this case, the jack means which form a pair in the diameter direction of the kiln shell are mutually connected. Since the reaction force is canceled out, more stable positioning performance can be obtained, and the structural strength load can be reduced.

Incidentally, each jack means in the present invention can be constituted by, for example, a hydraulic jack. In this case, the interlocking operation means can be constituted by a hydraulic unit.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an embodiment of the present invention, in which the same reference numerals as in FIGS. 4 and 5 denote the same parts.

As shown in FIGS. 1 and 2, in the present embodiment, the two kiln shells 1a, 1b straddle both boundary positions inside the two kiln shells 1a, 1b to be connected.
1b is disposed so as to extend in the axial direction of the main frame 1b.
Each portion located on the a side and the other kiln shell 1b side is respectively equipped with eight extendable hydraulic jacks 12 (jack means) extending radially in the radial direction of both kiln shells 1a and 1b. A hydraulic unit 13 (an interlocking operation means) for controlling the hydraulic jacks 12 so that they can be extended and contracted by the same amount at each arrangement position is installed at a position near the inside of both kiln shells 1a and 1b.

The hydraulic jacks 12 are fixed at their base ends to the body frame 11 so that the
The fixed piston rod portion 12a has a tip extending outward in the radial direction of the fixed piston rod portion 12a, and a movable cylinder portion 12b slidably fitted to the tip of the fixed piston rod portion 12a. The cylinder unit 12b is supplied and discharged with hydraulic oil from the hydraulic unit 13 so that the kiln shell 1
It moves forward and backward toward the inner peripheral surfaces of a and 1b.

As shown in FIG. 3, the hydraulic unit 13 is provided with two systems of supply and discharge lines (FIG. 3) so that hydraulic oil can be supplied to and discharged from each of the eight hydraulic jacks 12 in one set. Here, only the entire system is shown for one system, and only a part is shown for the second system having the same configuration.)
And a pump 15 for sending hydraulic oil from the oil tank 14 at a predetermined supply pressure, and switching the hydraulic oil from the pump 15 to one of the two lines as appropriate for each system. An electromagnetic valve 16 for sending out is provided.

The two supply / discharge lines of the hydraulic unit 13 are respectively led to each set of the hydraulic jacks 12 and branched at a branch point P, and the oil chambers responsible for the extension operation of the eight movable cylinder portions 12b. It is connected so that hydraulic oil can be appropriately supplied / discharged to / from an oil chamber that performs contraction operation.

Here, the supply / discharge line branched and connected to the movable cylinder portion 12b of the same set of hydraulic jacks 12 at the branch point P reaches the respective movable cylinder portions 12b with the same length from the branch point P. Thus, the uniformity of the hydraulic pressure in each system is ensured, and the operating time difference does not occur between the hydraulic jacks 12 of the same set.

When the hydraulic jacks 12 disposed on one of the kiln shells 1a are supplied and supplied with hydraulic oil from the hydraulic unit 13, the hydraulic jacks 12 are extended in a radial manner in synchronization with each other. The hydraulic jacks 12 extend evenly and hit the entire inner peripheral surface of one of the kiln shells 1a,
The body frame 1 is positioned at the axial center of the one kiln shell 1a.
1 will be positioned.

Thereafter, each of the hydraulic jacks 12 disposed on the other kiln shell 1b side is connected to the hydraulic unit 13
When the hydraulic oil is supplied and discharged from the main frame 11 and the hydraulic oil is radially extended by the same amount, the other kiln shell 1b is positioned by the hydraulic jacks 12 with respect to the main body frame 11 fixed to the one kiln shell 1a. Is adjusted, and at the stage when the respective hydraulic jacks 12 are evenly extended and abut against the inner peripheral surface of the other kiln shell 1b, the other kiln shell 1b is positioned at the arrangement position such that the main body frame 11 is located at the axial center position. As a result, the other kiln shell 1b is concentrically aligned with the one kiln shell 1a.

After the two kiln shells 1a and 1b concentrically aligned with each other are connected by means of welding or the like, all the hydraulic jacks 12 at the respective positions are contracted to form the two kiln shells 1a of the main body frame 11. , 1
b, the fixed state may be released, and the kiln shell aligning device may be removed from the opposite end of one of the kiln shells 1a and 1b.

This eliminates the need for a strong back as in the prior art, so that the kiln shells 1a, 1
(b) After the mutual connection work is completed, there is no need to remove all the strong back welded to the inner peripheral surface of the end of one of the kiln shells 1a or to finish a large number of welding traces remaining after the removal with a grinder. Become.

If the hydraulic jacks 12 are arranged so as to form a pair in the diametric direction of the kiln shells 1a and 1b, as in this embodiment, the hydraulic jacks 12 make a pair in the diametric direction of the kiln shells 1a and 1b. Since the mutual reaction forces are offset, more stable positioning performance is obtained, and
The structural strength burden can be reduced.

Therefore, according to the above embodiment, the kiln shells 1a and 1b can be easily and concentrically aligned with each other by the kiln shell aligning device which does not have to be removed after use. It is not necessary to remove all the strong back after the connection work is completed, or to finish a large number of welding traces remaining after the removal with a grinder or the like, thereby reducing the work load and shortening the construction period. Shortening can be achieved.

The kiln shell aligning device of the present invention is not limited to the above-described embodiment, and the jack means may be an air cylinder or an electric jack other than the hydraulic cylinder. Also, as the interlocking operation means, other than the hydraulic unit according to the type of the jack means can be adopted, and various changes can be made without departing from the gist of the present invention.

[0029]

According to the above-described kiln shell aligning device of the present invention, the kiln shell aligning device can be easily and concentrically aligned by the kiln shell aligning device which does not require much time for removal after use. It eliminates the need to remove all the strong back after the connection work is completed, or to finish many welding marks remaining after the removal with a grinder, thereby reducing the work load and shortening the construction period. Various excellent effects can be achieved, such as the ability to achieve the effect.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG.

FIG. 3 is a system diagram showing details of a hydraulic unit of FIG. 1;

FIG. 4 is a perspective view showing a part of a general rotary kiln.

FIG. 5 is a side sectional view showing an example of a conventional aligning means for kiln shells.

[Explanation of symbols]

 1a Kiln Shell 1b Kiln Shell 11 Main Frame 12 Hydraulic Jack (Jack Means) 13 Hydraulic Unit (Interlocking Operating Means)

Claims (3)

[Claims] 1. A kiln shell aligning device for aligning one kiln shell with another kiln shell so as to be concentric with each other when the kiln shells are connected to each other. A body frame disposed and extending in the axial direction of the two kiln shells; and a plurality of radially extending radially in the both kiln shells from respective portions of the body frame located on one of the kiln shell sides and the other kiln shell side. A kiln shell centering device comprising: extendable jack means; and interlocking operation means for controlling the respective jack means to be extended and contracted by the same amount at each arrangement position. 2. The kiln shell centering device according to claim 1, wherein each jack means is arranged so as to form a pair in a diameter direction of the kiln shell. 3. The kiln shell centering device according to claim 1, wherein each jack means is constituted by a hydraulic jack, and the interlocking operation means is constituted by a hydraulic unit.